Fipronil Spot-On kills fleas for up to five weeks and ticks for up to four weeks. For dogs over 8 weeks of age and weighing between 2-10kg. UK authorised veterinary medicine. Beaphar FIPROtec® Spot-On for Medium Dogs kills fleas and ticks on dogs, and continues to kill fleas for up to five weeks and ticks for up to four weeks. Suitable for dogs over 8 weeks of age and weighing between 2-10kg. ALWAYS FULLY READ THE PRODUCT LEAFLET AND PACKAGING BEFORE USE Weigh your dog carefully before application to ensure it is over 2kg. Do not remove the pipette from the blister until the product is ready to be used. Holding the pipette upright, snip off the top of the pipette.